Highway Median Impacts on Wildlife Movement and Mortality
Anthony P. Clevenger, Ph.D., Angela V. Kociolek, M.Sc. - 2006
Organization: Western Transportation Institute College of Engineering Montana State University
Highway median barriers are used to separate lanes of traffic and enhance motorist safety on freeways and multi-lane interstate highways.
Median barriers of all types have the potential to impede animal movements across highways. Barriers may also increase the risk of road
mortality if wildlife becomes trapped or confused while on the road searching for a place to cross.
A recent Transportation Research Board report highlighted the need to better understand the potential impacts of highway barriers. The lack of
information to properly assess environmental impacts is causing significant project delays and increasing transportation project costs.
This study includes a state of the practice survey and a review and synthesis of the literature on highway median barriers, their impacts to
wildlife movement and performance of mitigative design solutions and provides Caltrans with research recommendations.
Document Type: mitigation design
other mitigation initiatives
Infrastructure Asset: existing roadway